I know exactly where you are. I am a 83 year old male with severe chronic back pain and horrible balance problems. Have seen 5 neurologists over 7 years and no diagnosis. Saw Chiropractic Doctor who said I have Parkinsons. Neurologist said she doesn't think it is. So doctors disagree and know very little. Next going to Balance Disorder Clinic. Don't have much hope for any conclusive diagnosis. I keep going for sake of my wife, kids and grandkids. I pray your husband gets some relief. God bless.